PURPOSE: To obtain the subject compound having high purity and useful as a raw material for resins such as polyamide or polyimide, in colorless or faintly colored state, by reacting an aromatic ketone with anilines in an atmosphere essentially free from oxygen gas.
CONSTITUTION: An aromatic bisaniline compound [e.g. 9,9-bis(4-aminophenyl) fluorene] can be produced by reacting an aromatic ketone with an aniline compound in an atmosphere essentially free from oxygen. The reaction is preferably carried out in nitrogen atmosphere, especially by passing nitrogen gas through the reactor at a rate of 0.5-10 pts.vol. of nitrogen per 1hr based on 1 pt.vol. of the reactor. It is particularly preferable to carry out the reaction by adding 2-30mol of aniline, 1-10mol of aniline hydrochloride and an azeotropic solvent for water produced by the reaction to 1mol of fluorenone and heating at 55-150°C. A colorless aromatic bisaniline compound can be produced in high yield at a relatively low temperature by this process.
TERAMOTO TAKEO
KATAHIRA SUMIO
TAKAYAMA TAKESHI
KOYAMA TOYOHIKO
NIPPON STEEL CORP